How to use the file source code as source_code

[bjufre]

Hello,

I'm trying to use miette within a library that I'm writing and I would like to first: panic whenever I find the error without bubbling to the top (I need to fail fast), which from what I understand should be possible with format!("{:?}") right?. And secondly, I'm keeping track of two Locations (std::panic::Location) which have the file and the lines for when the caller called certain functions. My idea was to do some basic math to get the line start and the line end of the file in questions and I would like to pass that to miette to use as source_code ; is that possible?

Thank you in advance!!